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In a three phase transformer(delta/star connected)when i
touch one end of the bulb in any one phase and other end to
earth..will the bulb glow or not..if not why?..i'm touching
the bulb in star connected side...

Question Posted / vksumith

Answers were Sorted based on User's Feedback



In a three phase transformer(delta/star connected)when i touch one end of the bulb in any one phase..

Answer / jagjeet

If it is distribution transformer and having 440 line to
line voltage , definately bulb should glow because the
bulb has been connected via earth i.e. 220 volts ( Phase &
Earth)

Is This Answer Correct ?    18 Yes 3 No

In a three phase transformer(delta/star connected)when i touch one end of the bulb in any one phase..

Answer / arockia doss

Bulb will glow.

Since, The req. voltage for the bulb will be coming from
the phase.

The neutral will be coming from the Earth.

Becuase, In the star connected trf. the neutral will be
earthed & So that, the bulb will glow.

Thanks ...
A.Arockia Doss

Is This Answer Correct ?    11 Yes 1 No

In a three phase transformer(delta/star connected)when i touch one end of the bulb in any one phase..

Answer / vinay sangwan

This question is not complete because star side voltage is
not specified.

Is This Answer Correct ?    7 Yes 7 No

In a three phase transformer(delta/star connected)when i touch one end of the bulb in any one phase..

Answer / vksumith

secondary(star connected) phase voltage is 110v and line
voltage is around 230v..

Is This Answer Correct ?    3 Yes 3 No

In a three phase transformer(delta/star connected)when i touch one end of the bulb in any one phase..

Answer / sachin rana

bulb will be glow if transformer is properly earthed i.e body as well as neutral

Is This Answer Correct ?    0 Yes 0 No

In a three phase transformer(delta/star connected)when i touch one end of the bulb in any one phase..

Answer / bala123

Definetely the Bulb will glow,because essential points for
glow the lamp can get via your body i.e phase and
neutral,hence the lamp will glow.Incase if not,i think (not
sure) your body may have higher ohmic resistace.

Is This Answer Correct ?    2 Yes 5 No

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